EP2296909A2 - Élément de sécurité à couche tramée sur un substrat translucide - Google Patents

Élément de sécurité à couche tramée sur un substrat translucide

Info

Publication number
EP2296909A2
EP2296909A2 EP09761396A EP09761396A EP2296909A2 EP 2296909 A2 EP2296909 A2 EP 2296909A2 EP 09761396 A EP09761396 A EP 09761396A EP 09761396 A EP09761396 A EP 09761396A EP 2296909 A2 EP2296909 A2 EP 2296909A2
Authority
EP
European Patent Office
Prior art keywords
layer
security element
substantially opaque
element according
raster elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09761396A
Other languages
German (de)
English (en)
Other versions
EP2296909B1 (fr
Inventor
Manfred Heim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41317734&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2296909(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP2296909A2 publication Critical patent/EP2296909A2/fr
Application granted granted Critical
Publication of EP2296909B1 publication Critical patent/EP2296909B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/06—Designs or pictures characterised by special or unusual light effects produced by transmitted light, e.g. transparencies, imitations of glass paintings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/364—Liquid crystals
    • B42D2033/04—
    • B42D2035/14—
    • B42D2035/16—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs

Definitions

  • the invention relates to a security element comprising at least one light-transmissive substrate on which there is a substantially opaque, screened layer of raster elements.
  • Security elements made of at least one translucent substrate, on which a substantially opaque, screened layer of raster elements is located, are known from the prior art.
  • a thin-film element made of a reflective, a dielectric and a partially transparent or absorbing layer is known.
  • the absorbent layer is vapor-deposited or printed over the whole area and partially removed again by means of ablation methods, such as etching, laser ablation or spark erosion.
  • ablation methods such as etching, laser ablation or spark erosion.
  • a partial application of the partially permeable layer by vapor deposition with pattern-shaped vapor masks is possible.
  • the partially transparent layer thus consists of a substantially opaque, screened layer of raster elements.
  • the invention has the object of developing a generic security element such that the protection against counterfeiting is further increased.
  • At least one thin, continuous, substantially opaque line is arranged within the essentially opaque, screened layer of raster elements, which line has the shape of at least one alphanumeric line. meric character, a graphic or a pattern.
  • Such lines have line widths of at least 0.1 mm to 5 mm, preferably from 0.2 mm to 0.7 mm, particularly preferably about 0.5 mm.
  • the security element thus shows, viewed at least from the side of the substantially opaque, screened layer, a different appearance in supervision than in transparency.
  • the security element according to the invention is preferably applied to a data carrier with a light-transmitting, preferably translucent, and particularly preferably transparent region.
  • the data carrier is in particular a value document, such as a banknote, a security, a credit or identity card, a passport, a document and the like, a label, a packaging or another element for product assurance.
  • the translucent area is, for example, a window in the form of a continuous opening, which is covered by a translucent, preferably translucent, particularly preferred transparent film.
  • the security element according to the invention is visible from both sides of the data carrier.
  • a substantially opaque layer has a light transmittance of less than 20%, preferably less than 10% and particularly preferably about%%.
  • the substantially opaque, screened layer consists of a plurality of raster elements.
  • the raster elements are either recesses in the essentially opaque layer and thus form a type of negative image, or are essentially opaque, pattern elements spaced from one another and thus form a kind of positive image.
  • the raster elements in their entirety give the shape of at least one alphanumeric character, a graphic or a pattern.
  • viewing in incident light is illumination of the security element from one side and viewing of the security element from the same side.
  • a reflection in incident light is thus present, for example, when the front of the security element is illuminated and also viewed.
  • a reflection in transmitted light in the sense of this invention is a lighting of a security element from one side and a viewing of the security element from another side, in particular the opposite side.
  • a reflection in transmitted light is thus present, for example, when the back of the security element illuminated and the front of the security element is considered. The light thus shines through the security element.
  • the raster elements are arranged stochastically and / or grid-like.
  • a grid according to this invention is a uniform or non-uniform distribution of grid elements, wherein the grid elements are spaced apart.
  • the individual grid elements in arbitrary forms executable. If particular shapes of raster elements are chosen, this may even be an additional security feature, e.g. Raster elements in the form of a text or a micrograph. If the grid elements are circular and / or linear, the preferred circle diameter or the preferred line width is 10 ⁇ m to 100 ⁇ m.
  • the proportion of the total area of the plurality of grid elements, based on the total area of the security element, is 10% to 40%, preferably about 20%.
  • the substantially opaque, screened layer is metal or a printed layer.
  • the surface of the substrate to which the raster elements are applied can be provided, at least in partial regions, with embossed diffractive structures or an embossing lacquer layer with embossed diffractive structures.
  • the metallic raster elements reflect the incident light so that the diffractive structures form a hologram, sub-wavelength grating or blazed grating or a matt structure.
  • At least one translucent, liquid-crystalline layer can be applied via the substantially opaque, screened layer.
  • at least one optically variable thin-film layer consisting of at least one dielectric layer can be applied via the substantially opaque, screened layer. If the essentially opaque, screened layer of raster elements is designed as a reflective layer, the thin-film layer additionally has at least one partially transparent layer. If, however, the substantially opaque, screened layer of raster elements is designed as a partially transparent layer, the thin-film layer additionally has at least one reflective layer. In both cases, the resulting thin-film layer thus comprises a reflective layer, a middle dielectric layer and a partially transparent layer, wherein in addition the reflective layer or partially transmissive layer opposite the raster elements can also have raster elements or recesses.
  • reflective substances for the reflective layer in particular metals, such as aluminum, silver or copper,
  • dielectric layer SiCh silicon dioxide
  • ZTOZ zirconium dioxide
  • MgF 2 magnesium difluoride
  • TiO 2 titanium dioxide
  • other transparent substances such as very thin and extremely uniformly printed transparent lacquers
  • chromium and / or nickel, iron, silver, gold, or alloys thereof such as Inconel TM (Ni-Cr-Fe).
  • the individual layers of the security element can be printed on a substrate and / or applied by vapor deposition, for example by means of known printing methods or by vacuum deposition, such as sputtering, reactive sputtering, physical vapor deposition or chemical vapor deposition.
  • vapor deposition for example by means of known printing methods or by vacuum deposition, such as sputtering, reactive sputtering, physical vapor deposition or chemical vapor deposition.
  • absorber materials, dielectrics and reflector materials are printed in each case superimposed or overlapping layers on the substrate and / or vapor-deposited.
  • the metals which are suitable for the reflective and semitransparent layer are required in very thin layers with layer thicknesses of about 5 nm to 100 nm. These layers are preferably applied by means of vacuum evaporation, the metal in question being heated and evaporated in vacuo by means of a heating device, for example a resistor or an electron beam. The metal then deposits as a thin layer on a film moved across it.
  • a heating device for example a resistor or an electron beam.
  • the various variants of the vacuum vapor deposition method are also suitable. In order to produce uniform colors, it is necessary in this case to keep the layer thickness extremely uniform, which is achieved in particular by sputtering or also well-controlled thermal or electron beam vapor deposition processes.
  • the transparent dielectric may also be applied in the form of a transparent ink by means of a printing process.
  • the utmost care in the coating process is necessary in order to ensure the required layer thickness uniformity, with a tolerance of, for example, ⁇ 2%.
  • the known methods such as washing method, etching, oil ablation, lift-off or laser demetallization, are advantageously used.
  • FIG. 1 shows a security element according to the invention comprising at least one translucent substrate on which there is a substantially opaque, screened layer of raster elements and a thin, continuous, substantially opaque line, in side view
  • 2 shows the security element according to the invention from FIG. 1 in plan view, wherein the thin, continuous, essentially opaque line forms a five-pointed star
  • FIG. 1 which forms an optically variable thin-film layer together with two further layers, which are applied to the substantially opaque, screened layer of raster elements, in side view, FIG.
  • FIG. 4 shows a security element according to the invention, in which an embossing lacquer with embossed structure is applied to a substrate, on which the substantially opaque, screened layer of grid elements and a thin, continuous, substantially opaque line is located, in side view.
  • FIG. 1 shows a security element according to the invention comprising at least one translucent substrate 2, on which there is a substantially opaque, screened layer 1 of raster elements 3 and a thin, continuous, substantially opaque line 4, in side view.
  • the raster elements 3 are circular and / or linear, the circular recesses having a diameter of 10 micrometers to 100 micrometers, preferably of 30 micrometers to 50 micrometers, and the linear recesses having a width of 30 micrometers to 70 micrometers.
  • FIG. 2 shows the structure according to the invention according to FIG. 1 in transmitted light from the side of the reflective layer 3.
  • a thin, continuous line 4 in the form of a five-pointed star.
  • This line has a width of 0.1 mm to 5 mm, so that the line in transmitted light striking enough. In incident light, it is virtually invisible to a viewer, regardless of its line width. In transmitted light, the viewer thus sees the star and in reflected light no star.
  • Fig. 3 shows the security element according to the invention from Fig. 1, which forms an optically variable thin-film layer together with two further layers 5 and 6 which are applied to the raster elements 3 and the line 4.
  • the layer 5 forms a dielectric layer.
  • the layer 6 and the grid elements 3 together with the line 4 form the reflective layer or the partially transparent layer.
  • the layer 6 is either over the entire surface or in addition, as shown in Fig. 3, executed in the region 7 of raster elements.
  • the security element according to the invention is particularly advantageously combined with known optically active microstructures, such as, for example, diffractive embossed holograms, zero order gratings, refractive microstructures, such as blazed gratings and the like.
  • optically active microstructures such as, for example, diffractive embossed holograms, zero order gratings, refractive microstructures, such as blazed gratings and the like.
  • FIG. 4 shows such a combination with a stamping hologram.
  • an embossing lacquer 8 is applied with an embossed structure.
  • the substantially opaque, screened layer 1 of raster elements 3 together with the thin, continuous, substantially opaque line 4.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Credit Cards Or The Like (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

L'invention concerne un élément de sécurité comprenant au moins un substrat transparent sur lequel se situe une couche tramée sensiblement opaque d'éléments de trame. Selon l'invention il est prévu à l'intérieur de la couche tramée sensiblement opaque d'éléments de trame au moins une mince ligne continue sensiblement opaque ayant la forme d'au moins un caractère alphanumérique, d'un graphique ou d'un motif. De telles lignes présentent des largeurs comprises entre au moins 0,1 et 5 mm, de préférence entre 0,2 et 0,7 mm, de préférence encore de l'ordre d'approximativement 0,5 mm. En lieu et place de lignes, il est également possible d'utiliser des zones planes sans évidement, de sorte que le caractère alphanumérique, le motif ou le graphique obtenu ne puisse être identifié qu'en transparence et non en vue opaque. Vu au moins du côté de la couche tramée sensiblement opaque, l'élément de sécurité présente ainsi en vue opaque, une autre image qu'en transparence.
EP09761396.2A 2008-06-12 2009-05-28 Élément de sécurité à couche tramée sur un substrat translucide Revoked EP2296909B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008027952A DE102008027952A1 (de) 2008-06-12 2008-06-12 Sicherheitselement mit gerasterter Schicht aus Rasterelementen
PCT/EP2009/003794 WO2009149833A2 (fr) 2008-06-12 2009-05-28 Élément de sécurité à couche tramée composée d'éléments de trame

Publications (2)

Publication Number Publication Date
EP2296909A2 true EP2296909A2 (fr) 2011-03-23
EP2296909B1 EP2296909B1 (fr) 2014-12-03

Family

ID=41317734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09761396.2A Revoked EP2296909B1 (fr) 2008-06-12 2009-05-28 Élément de sécurité à couche tramée sur un substrat translucide

Country Status (6)

Country Link
US (1) US9308774B2 (fr)
EP (1) EP2296909B1 (fr)
CN (1) CN102056748B (fr)
CA (1) CA2726432C (fr)
DE (1) DE102008027952A1 (fr)
WO (1) WO2009149833A2 (fr)

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WO2009149833A2 (fr) 2009-12-17
US9308774B2 (en) 2016-04-12
EP2296909B1 (fr) 2014-12-03
US20110091665A1 (en) 2011-04-21
CA2726432A1 (fr) 2009-12-17
CA2726432C (fr) 2017-01-10
CN102056748A (zh) 2011-05-11
CN102056748B (zh) 2013-05-01
DE102008027952A1 (de) 2009-12-17
WO2009149833A3 (fr) 2010-04-15

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